WASHINGTON (Reuters] – An undercover FBI agent posed for a foreign government and sold secret information on nuclear submarines to a U.S. Navy engineer, according to the Justice Department.

Jonathan Toebbe was arrested in West Virginia with his wife Diana. They were charged for violating the Atomic Energy Act. On Tuesday, they will appear before a West Virginia Federal Court.

Toebbe (42), a Navy nuclear engineer, was granted top security clearance and sent a packet of sensitive data to an unknown country in 2020. Later, Toebbe began to sell secrets to an FBI agent pretending to be a foreign official for thousands of dollars.

The Justice Department stated that Toebbe once concealed documents concerning submarine nuclear reactors on a digital memory stick in half of a peanut butter sandwich in a dead drop location in West Virginia. While his wife looked out, it was done.

According to an affidavit from a federal court, the memory card had “militarily sensitive design elements and operating parameters as well as performance characteristics of Virginia class submarine reactors.”

The Justice Department stated that another memory card was hidden in a package of chewing gum.

According to the Justice Department, Toebbe was paid separate cryptocurrency payments in total of $100,000.

Officials stated that Toebbe, a Maryland native, and his wife were taken into custody after Toebbe placed yet another memory card in a West Virginia drop-off location. A criminal complaint stated that they were facing charges of conspiracy as well as “communications restricted data.”

In the Justice Department statement and court papers, no attorney representing the Toebbes were listed.